Stock LCAs to Mopar Extended LCAs - Caster Change

[jmr]

I just got in 2 Mopar Lift LCA part # 68322798AA they are 1/4" longer. The LCA are heavier each weighing 8.5 pounds where my stock 2024 JL Rubicon LCA weighed 7 pounds (according to my fish scale lol).

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[ShadowsPapa]

Springs tend to be stiffer they tend to account for things like bumpers,winches bigger tires. So then what ya have to do is realize now it takes a deeper hole a deeper swoop to flex those spings.

Springs can lift in two ways - either one, or a combination of both -

Length, but same rate, lifting but maintaining the rate for the same ride. Doesn't compensate for added weight.

Rate, but same or similar length. A higher rate will not compress as far under the same weight, so holds the vehicle up higher. Higher rates help deal with added weight.

Or - a taller spring with a multiple rate set of coils, or a higher rate for handling the added weight of bumper, winch and other fun stuff.

I used Synergy springs - taller, to give my JT Overland a bit of a lift up front, and dual rate to handle the extra weight of the steel bumper, winch, winch plate - and snow plow in the winter.
It lifted the truck a bit, but the ride was impressive!

 

[ShadowsPapa]

I just got in 2 Mopar Lift LCA part # 68322798AA they are 1/4" longer. The LCA are heavier each weighing 8.5 pounds where my stock 2024 JL Rubicon LCA weighed 7 pounds (according to my fish scale lol).

1/4" of steel tubing added 1.5 pounds? That must be really heavy-walled stuff.

Or, you have a fish scale you use to brag to your friends about your latest catches............and there's something fishy about that scale.

 

[Stan H]

Springs can lift in two ways - either one, or a combination of both -

Length, but same rate, lifting but maintaining the rate for the same ride. Doesn't compensate for added weight.

Rate, but same or similar length. A higher rate will not compress as far under the same weight, so holds the vehicle up higher. Higher rates help deal with added weight.

Or - a taller spring with a multiple rate set of coils, or a higher rate for handling the added weight of bumper, winch and other fun stuff.

I used Synergy springs - taller, to give my JT Overland a bit of a lift up front, and dual rate to handle the extra weight of the steel bumper, winch, winch plate - and snow plow in the winter.
It lifted the truck a bit, but the ride was impressive!

Yeah , I should have clarified about dual or even triple rate springs. I am using Dual rate springs.

 

[D_JT]

I forgot to add that I have switched out the AEV lift spacers for a set of springs from RockKrawler. Don't like spacers, however the AEV ones were probably the most comfortable ones I've ever run.

Thats like saying you changed your bed frame but not your mattress and now your bed is more comfortable. The mattress is still the same. What you experienced is what's called a placebo.

 

[Stan H]

1/4" of steel tubing added 1.5 pounds? That must be really heavy-walled stuff.

Or, you have a fish scale you use to brag to your friends about your latest catches............and there's something fishy about that scale.

I was under the understanding that the Extended LCA'S (mopar) were 3/16" and only 1 pounder heavier

 

[JTGuy]

IMO, shocks will change the ride as much or more than the springs. My JKS geo brackets really changed my ride for the better.

 

[Splenda]

And thats why when I did my Lift I got all that stuff in advance and changed LCA's Travk bars , springs , Tie rod and linkage and Never experienced any change except no more bottoming out . The Rubicon factory springs are way way too soft.

So are the Mojave springs. I replaced the plastic front bumper and added a winch, and noticed bottoming out.

 

[ShadowsPapa]

So are the Mojave springs. I replaced the plastic front bumper and added a winch, and noticed bottoming out.

The springs are installed based on the curb weight of the vehicle as built.
When you add weight, permanent weight, you need to boost the spring rate.
I'd bet there are at least 3 different part numbers for front Mojave springs - based on the build of the Mojave, just like there are several different Rubicon springs. Not enough to say "I have Rubicon springs" - I'd ask - so, which ones? There are several.

In your case, you exceeded the weight that the front springs were designed for and need another part number Mojave spring.

 

[Splenda]

1/4" of steel tubing added 1.5 pounds? That must be really heavy-walled stuff.

Or, you have a fish scale you use to brag to your friends about your latest catches............and there's something fishy about that scale.

When I got the Core 4x4 Crawl control arms, I honestly could not believe how much heavier the 1.75” OD DOM tubing with a 5/16” wall thickness was. I swear they feel like they're solid all the way through.

 

[Splenda]

The springs are installed based on the curb weight of the vehicle as built.
When you add weight, permanent weight, you need to boost the spring rate.
I'd bet there are at least 3 different part numbers for front Mojave springs - based on the build of the Mojave, just like there are several different Rubicon springs. Not enough to say "I have Rubicon springs" - I'd ask - so, which ones? There are several.

In your case, you exceeded the weight that the front springs were designed for and need another part number Mojave spring.

That's why waited to install the winch and I lifted it a week later. After the lift, the front ended up being an inch and a half higher than the rear, so I supplemented the rear with some Terraflex coil spacers. It turned out perfect!

 

[Stan H]

So are the Mojave springs. I replaced the plastic front bumper and added a winch, and noticed bottoming out.

Yep and although the shocks get some kinda good rep at times they are still valved too light.
I went with Falcons and they are set for off road/performance. And trust me it take a #e!! Of a hole to make it hit the bumpstops .

 

[Splenda]

Yep and although the shocks get some kinda good rep at times they are still valved too light.
I went with Falcons and they are set for off road/performance. And trust me it take a #e!! Of a hole to make it hit the bumpstops .

I am still using and love my Mojave shocks. Once you learn how they work and that you have to lean into turns, they really make driving the Gladiator fun. I dread replacing them and getting a rougher ride.

 

[Stan H]

I am still using and love my Mojave shocks. Once you learn how they work and that you have to lean into turns, they really make driving the Gladiator fun. I dread replacing them and getting a rougher ride.

These just do it for you you hit a big swoop you pop right up . Turns limited nearly mitigated swaying. I dont want to ever see a fox shocks again.

 

[Splenda]

These just do it for you you hit a big swoop you pop right up . Turns limited nearly mitigated swaying. I dont want to ever see a fox shocks again.

I don't think the Mojave shocks and Rubicon shocks are similar at all. I used to have an RC truck that I could drop on it's tires from about 6 feet, and it would just squat a little and pop right back up. The Mojave shocks feel like that to me. They are very progressive and take less force to compress when fully extended, but get much firmer as they compress.
I just wish they were a little longer. I will eventually replace them with longer shocks, but the ride will probably go to shit. I just hate running shock extensions. I love the way mine rides right now, even with tires and wheels that weigh 125 pounds at each corner.

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